Communications — ranked by measured latency
Email, SMS, and messaging delivery APIs. Every figure below comes from real client-side traffic through the APIdown SDK, not from vendor status pages. Sorted fastest p95 first.
| Mailgun | operational | — | — | — | 100% | 0 | B- |
|---|---|---|---|---|---|---|---|
| Postmark | operational | — | — | — | 100% | 0 | B- |
| SendGrid | operational | — | — | — | 100% | 0 | B- |
| Twilio | operational | — | — | — | 100% | 0 | B |
Dashes mean we had no signals for that API in the window — not that it was down. See the full reliability leaderboard, subscribe to the Communications feed, or build a stack watchlist.